first remove subroutine

例句：

1. 1. The subroutine is designed to automate the process of data entry.
   这个子程序旨在自动化数据输入过程。
2. 2. The programmer needs to know how to write asubroutine for the program.
   程序员需要知道如何为程序编写子程序。
3. 3. The subroutine was written in C++ and canbe easily modified by other programmers.
   该子程序是用C++编写的，其他程序员可以轻松地对其进行修改。